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17nork Rose, MalcolmGaiak “...Genetic engineering Moral and ethical aspects Juvenile fiction...”
Argitaratua 2002
Liburua -
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19nork Swindells, Robert E., 1939-Gaiak “...Genetic engineering Moral and ethical aspects Juvenile fiction...”
Argitaratua 1994
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20nork Stannard, RussellGaiak “...Science Moral and ethical aspects Juvenile fiction....”
Argitaratua 2002
Liburua